摘要
采用两段微生物柱浸对某铜矿尾矿渣中的有价金属进行二次回收研究。考察预处理酸度、接种量、尾矿和废石装矿方式及废石粒度等因素对铜、锌浸出的影响。结果表明,两段微生物柱浸无论改变接种量还是预处理酸度,尾矿最终铜离子浸出率均大于30%,在预处理酸度为5%、接种量10%、-2 mm废石粒级的条件下,铜浸出率可达到38.8%,锌浸出率可达到87.45%。不同的装矿方式浸出差异性不大,分层装尾矿和采场废石并不能有效改善柱子的渗透性。柱浸体系中铜锌浸出动力学模型表明,铜、锌的浸出符合内扩散控制模型。
Valuable metals were recovered from tailings of a copper mine by two-stage column bioleaching.Effects of pretreatment acidity,inoculation quantity,loading mode of tailing and waste rock,and particle size of waste rock on copper and zinc leaching were investigated.The results show that copper leaching rate is 30%above regardless of change of inoculation amounts and pretreatment acidity.Leaching rate of copper and zinc is 38.8%and 87.45%respectively under the conditions including pretreatment acidity of 5%dilute sulfuric acid,inoculation of 10%,and particle size of waste rock of-2 mm.Permeability of column is not effectively improved by different loading methods.The results of kinetics models of copper and zinc leaching in column leaching system show that leaching of copper and zinc accords with internal diffusion control model.
作者
毛羽
傅开彬
钟秋红
王磊
候普尧
MAO Yu;FU Kai-bin;ZHONG Qiu-hong;WANG Lei;HOU Pu-yao(Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education,Mianyang 621010,Sichuan,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2020年第9期80-87,共8页
Nonferrous Metals（Extractive Metallurgy)
基金
四川省科技计划资助项目(20ZDYF1597)
国家重点研发计划项目(2019YFC1803503,2019 YFC1803504)。
关键词
铜
锌
微生物柱浸
动力学
copper
zinc
column bioleaching
kinetics
